Move obj from center which are not in the same plane
@shonemml wrote:
....The move command cannot move objects at right angles if they are not in a plane.
I need a lisp that moves more objects from their centers. ....
A starting place would be MirrorAcrossObject.lsp with its MAO command, available >here<. It finds the middle of the bounding box of each object, and it finds the closest point to that along the path object. It uses the direction of the path object at that point for a Mirror axis, but could easily be adjusted to use the direction perpendicular to that as a Move direction. Does that sound like it would do what you want?
Further clarification questions:
I assume that by "right angles" you mean that you want to Move things in a direction perpendicular to some path object such as a roadway edge. Is that correct? Would that path object always be the same kind of thing, such as a Polyline?
Would you always want things Moved farther from that path object, or might you sometimes want them Moved closer to it, or even possibly across it, if the Move distance is greater than their current distance from it?
@Kent1Cooper wrote:
@shonemml wrote:
....The move command cannot move objects at right angles if they are not in a plane.
I need a lisp that moves more objects from their centers. ....
A starting place would be MirrorAcrossObject.lsp with its MAO command....
Here's a modification to do that [lightly tested] -- the attached MovePerToObject.lsp with its MPO command. I didn't try with a 3D path object that varies in Z coordinate, but I think it should work, except that I think because the (angle) function returns XY-plane angle only, things should Move in the XY direction but not in the Z direction from their original locations. If something is at a different Z elevation from the nearest point on the path, such as on a bank beside the road, and you want it to "slide along the bank" including a change in Z coordinate, I think it would be possible, with some different calculations, to do that.
Some further clarification questions:
Some of the suggestions here, regarding an associative Array-along-a-path, would require the things you're Moving to be equally spaced along the starting path object. It seems clear to me that this is not always going to be the case -- from your image, the lower two spacings here are clearly greater than the upper spacings:
If they can't be assumed to be equally spaced, I think the Array-along-a-path approach is not going to do what you want.
And I can't quite tell from the image, but are the objects to be Moved starting off at the same distance from the roadway-edge path object? Some of the suggestions involving Offsetting [I assume so the objects can be Moved to the nearest place on the Offset-result path] would do you no good if the objects are starting out at different distances from the path, and you want them at new but still different distances from it. [And you are correct -- a 3DPolyline cannot be Offset, anyway.]
My MPO command requires neither equal spacing nor starting or ending positions at equal distances from the path.
